REV 0.0 April 18, 2023
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4.
Multiple DC Powered Sensors
The following example shows the Gateway wired to control multiple sensors.
As shown, the lower sensor is grounded through its metal housing, so the shield wire should not connect to either
Terminals 3 or 6 in that sensor. However, the shield wire is connected to the upper (isolated) sensor.
In multiple sensor configurations powered by the Gateway, the voltage of the power supply must be adequate to be
able to meet the load requirements (see section “B – Requirements - Power Supply” above).
Figure 4 – Multiple DC Sensor Connections - Shield Earth-Grounded at Power Supply
5.
Multiple DC Powered Sensors
The following example shows the Gateway wired to control multiple sensors, each with a current loop output to the
PLC.
As they are all DC version sensors, they are powered directly from the 24Vdc supply. It is shown as a separate power
supply, but one could use a 24Vdc supply from the PLC instead. In either case, the Sensor Supply output from the
Gateway is not connected in this example.
Note that all three sensors are shown as being isolated from earth/ground at their tanks, so the shield is grounded at the
power supply.
